I am looking ahead to lesson 71 (we are currently on lesson 69) and the Warm Up state to have "the child give the sums for 58+3 and 24+7. I know to use the facts with 8 strategy for the first sum but I'm not sure what strategy to use for the second sum. I know I'm probably missing something but would appreciate some clarity before getting to this lesson.

Thanks!

I'd also love to know what approach my dd is supposed to use when figuring out the Activity Problem in this lesson.

Hello Cassie,

Use the near ten strategy.

24+7=

4+7 is ten plus one more =11

If you have been playing Go To The Dump regularly chances are your child has already noticed in real life if they see a 7+3 it is 10, and most likely they made the connection that if 7+3 is 10 then 7+4 is 10 plus one more =11.

If you find they struggle with this concept, keep playing Go To the Dump, do Addition War and talk about the different strategies, do Go to the Dump with 11's and Go to the Dump with 9's.

So to restate how to solve this problem using near ten.

24+7
20+ 10+ 1
30+1
31

of course say in a way that makes sense to both of you. but that is the break down of the problem using the near ten strategy.

Please let me know if you have any more questions. You can email me directly at Carissa@alabacus.com .

Thank you for giving your child a RightStart in Math,

Carissa
RightStart™ Mathematics by Activities for Learning, Inc.

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Carissa,

Thank you for your thorough response!! I thought about the near ten (or making eleven is what I wrote in my notes) but I wanted to make sure I wasn't missing anything.

I am so grateful to have this resource whenever I have a question of problem!!

Have a great day!

Cassie

I don't even remember anything being called "the near ten strategy"! I feel like some of these lessons ask the kids to come up with the answer and explain it to me without giving me the background to help them out if they stumble. We just hit Lesson 76, and if we had practiced this "near ten strategy" this lesson wouldn't have been so absolutely foreign! Where is the near ten strategy in the book? I thought you had to make it a two-fives by giving one to the 4 from the seven, which is too many steps. I'm so confused!

Lisa,

Thank you for your message, I apologize for the delay in responding as I think I need to ask for your guidance!

I spoke with Dr. Cotter and looked at RSB Lesson 76 and am not seeing anything with "the near ten strategy" in that lesson, could you please guide me to where you read that in the lesson? We are not showing that the term "near ten strategy" occurs in Level B.

As far as the two 5's strategy, that is done in RSB Lesson 66, which can be explained as: This strategy for a sum, such as 6 + 7 involves seeing 6 as 5 + 1 and 7 as 5 + 2. The two fives make 10; the 1 and 2 make 3; thus, the answer is 10 + 3 = 13. There is trading quantities involved.

I hope this makes the two 5's strategy more clear, but please let me know where in Lesson 76 we were discussing the "near ten strategy" so we can clear up any confusion!

I look forward to hearing from you! Make it a great day!

Cassie